使用Sendinput以及GetAsyncKeyState来模拟按键延时

#include <windows.h>
#include <tchar.h>
#include <iostream>

BOOL flag = TRUE;

DWORD WINAPI ThreadProc2(LPVOID lpParameter)
{
    INPUT input[2];
    ZeroMemory(&input, sizeof(input));
    input[0].ki.wVk = input[1].ki.wVk = 0x45;
    input[0].type = input[1].type = INPUT_KEYBOARD;
    while (true)
    {
        if (GetAsyncKeyState(VK_NUMPAD0) & 0x8000)
        {    
            flag = TRUE;
            SetForegroundWindow(HWND(0x00060A3E)); //HWND is used for testing            
            input[1].ki.dwFlags = 0;
            input[0].ki.dwFlags = KEYEVENTF_KEYUP;
            SendInput(2, input, sizeof(INPUT));
            Sleep(500);
            while (flag)
            {                                                            
                input[1].ki.dwFlags = 0;
                input[0].ki.dwFlags = KEYEVENTF_KEYUP;
                SendInput(2, input, sizeof(INPUT));
                Sleep(10);
            }

        }
    }
}

DWORD WINAPI ThreadProc1(LPVOID lpParameter)
{
    while (true)
    {
        if (GetAsyncKeyState(VK_NUMPAD0) & 0x8000)
        {
            Sleep(2000);
            flag = FALSE;

        }
        else if (GetAsyncKeyState(VK_END) & 0x8000)
        {
            exit(1);
        }
    }

}

int main()
{
    DWORD tid1 = 0;
    DWORD tid2 = 0;
    HANDLE hThread1 = CreateThread(NULL, 0, ThreadProc1, NULL, 0, &tid1);
    HANDLE hThread2 = CreateThread(NULL, 0, ThreadProc2, NULL, 0, &tid2);

    getchar();
    return 0;
}